US20020101703A1 - Plastic capacitor - Google Patents
Plastic capacitor Download PDFInfo
- Publication number
- US20020101703A1 US20020101703A1 US10/000,502 US50201A US2002101703A1 US 20020101703 A1 US20020101703 A1 US 20020101703A1 US 50201 A US50201 A US 50201A US 2002101703 A1 US2002101703 A1 US 2002101703A1
- Authority
- US
- United States
- Prior art keywords
- wax
- ceramic particles
- plastic
- capacitor
- dispersed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229920003023 plastic Polymers 0.000 title claims abstract description 36
- 239000004033 plastic Substances 0.000 title claims abstract description 36
- 239000003990 capacitor Substances 0.000 title claims abstract description 19
- 239000000919 ceramic Substances 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 8
- 239000003989 dielectric material Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000002985 plastic film Substances 0.000 claims abstract description 5
- 229920006255 plastic film Polymers 0.000 claims abstract description 5
- 239000010409 thin film Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 4
- 229910002113 barium titanate Inorganic materials 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 4
- 239000005388 borosilicate glass Substances 0.000 claims description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000391 magnesium silicate Substances 0.000 claims description 3
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 3
- 235000019792 magnesium silicate Nutrition 0.000 claims description 3
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 229910052715 tantalum Inorganic materials 0.000 claims description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 3
- ZFZQOKHLXAVJIF-UHFFFAOYSA-N zinc;boric acid;dihydroxy(dioxido)silane Chemical compound [Zn+2].OB(O)O.O[Si](O)([O-])[O-] ZFZQOKHLXAVJIF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052845 zircon Inorganic materials 0.000 claims description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000001993 wax Substances 0.000 description 32
- -1 polyethylene Polymers 0.000 description 20
- 239000004698 Polyethylene Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 239000010408 film Substances 0.000 description 7
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 239000004203 carnauba wax Substances 0.000 description 4
- 235000013869 carnauba wax Nutrition 0.000 description 4
- 229940082483 carnauba wax Drugs 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000004594 Masterbatch (MB) Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012169 petroleum derived wax Substances 0.000 description 2
- 235000019381 petroleum wax Nutrition 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- IPCRARCFERITOG-UHFFFAOYSA-N 7-oxabicyclo[4.1.0]hepta-2,4-diene-3,6-dicarboxylic acid Chemical compound C1=CC(C(=O)O)=CC2OC21C(O)=O IPCRARCFERITOG-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 235000013871 bee wax Nutrition 0.000 description 1
- 239000012166 beeswax Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- CXJNRRJXWSODHK-UHFFFAOYSA-J terephthalate;titanium(4+) Chemical compound [Ti+4].[O-]C(=O)C1=CC=C(C([O-])=O)C=C1.[O-]C(=O)C1=CC=C(C([O-])=O)C=C1 CXJNRRJXWSODHK-UHFFFAOYSA-J 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/20—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06
- H01G4/206—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 inorganic and synthetic material
Definitions
- This invention relates to a plastic capacitor, particularly to a compact plastic capacitor with a large capacitance.
- Materials used for the dielectrics in capacitors include paper, plastic, and ceramic.
- Plastic is advantageously used because it can be easily processed into a thin film, has high resistivity, and, due to its low hygroscopic property, has higher insulation resistance than paper.
- Ceramic on the other hand, has a higher dielectric constant than plastic. It has a disadvantage, however, that the overall size of a capacitor using ceramic becomes larger, due to its hard processability into a thin film, than that of a capacitor made from plastic.
- the capacitor is composed of dielectrics formed of a plastic film containing ceramic particles, which have been pre-coated with wax.
- said ceramic is selected from the group consisting of titanium oxide, barium titanate, aluminum oxide, magnesium silicate, strontium oxide, zircon, aluminum nitride, carbon nitride, silicon carbide, zinc borosilicate glass, tantalum, and mixtures thereof
- the capacitor of the present invention includes dielectrics formed of plastic in which fine ceramic particles are dispersed. Said ceramic particles are, prior to dispersing in the plastic, pre-coated with wax on the surface by being immersed in the molten wax.
- Said plastic is selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polycarbonate and polytetrafluoroethylene.
- Said ceramic is selected from the group consisting of titanium oxide, barium titanate, aluminum oxide, magnesium silicate, strontium oxide, zircon, aluminum nitride, carbon nitride, silicon carbide, zinc borosilicate glass, tantalum, and mixtures thereof, preferably from titanium oxide, barium titanate and aluminum oxide.
- said ceramic is applied in fine particles whose diameter is practically 0.1 -0.4 ⁇ m, though it is more desirable that said diameter be smaller.
- Said wax is selected from the group of petroleum wax such as paraffin wax and microcrystalline wax, polyethylene wax obtained by cracking polyethylene, and natural fat such as fatty acids.
- the boiling point and the freezing point of the wax are important factors when the wax is selected, because the wax coating on the ceramic particles should be stable at room temperature and when immersed into the molten plastic.
- the boiling point and the freezing point of the wax depend on the components included, especially on the hydrocarbon length therein. In the present invention, the boiling point of the wax should be higher than the melting temperature of the plastic, practically higher than 200° C.
- the freezing point should be higher than room temperature.
- the objective of coating the surface of the ceramic particles with wax is to increase the affinity of the ceramic to the plastic. Therefore, the wax should be selected considering the properties of the plastic being used.
- polyethylene wax or petroleum wax is preferably selected for polyethylene and polypropylene, while natural fat such as beeswax or carnauba wax is suitable for polyethylene terephthalate, polystyrene, and polycarbonate.
- Coating of the ceramic particles with wax is attained by immersing the particles in the molten wax, and stirring thoroughly the mixture.
- the temperature of this treatment varies depending on the wax selected and on the plastic selected, but typically is 70-100° C.
- coating of the wax is also attained by immersing the particles into the solution prepared by dissolving the wax in an organic solvent having a relatively low boiling point, and by evaporating the solvent later to make the ceramic particles coated evenly with a small amount of the wax.
- the ratio of wax to ceramic particles may be extremely small, considering it is sufficient for the wax component to cover only the surface of the particles. Practically, though, a larger amount of wax is used.
- the amount in weight is 0.1-2.0 parts of wax, preferably 0.3-0.5 parts of wax, for each 100 parts of ceramic particles.
- Dispersing the ceramic particles into the plastic is attained by introducing the particles into the plastic that is molten by heating, and then mixing the mixture well.
- An alternative method is to first prepare a “master batch” of the plastic that contains a high-concentration of the ceramic particles, and then melt said master batch mixing with the plastic that has no ceramic particles.
- the “master batch” method is advantageous for facilitating the dispersion of the ceramic particles in the plastic.
- the amount of the ceramic particles added to the plastic is preferably 2-15wt. %, more preferably 5-10 wt. %, in the mixture. If said amount is less than 2 wt. %, it is sometimes insufficient for the effect expected in this invention, and if said amount is more than 15 wt. %, it sometimes causes difficulty in producing a thin film.
- the plastic in which ceramic particles are dispersed is then extruded into a thin film to be applied to a capacitor.
- the thickness of said film is, though it varies depending upon the capacitor to which said film is applied, typically 2-16 ⁇ m.
- the film may be stretched in one or two axial directions.
- the ceramic particles are pre-coated with wax to increase said particles' affinity to organic plastic to promote uniform dispersion of said particles in the plastic.
- the ceramic particles do not undergo a wax coating prior to being dispersed in the molten plastic, the association of the particles may not be sufficiently broken, which prevents uniform dispersion.
- the uniform dispersion gives the capacitor a preferable performance, particularly in its capacitance.
- the capacitor is manufactured by first piling up the films and electrode foils, such as aluminum or tin, in alternate layers, and then rolling up the resulting multi-layered sheet. Alternatively, it is also attained by first depositing some metal on the film, and then rolling it up.
- Plastic having a high dielectric constant was obtained by dispersing ceramic particles in it. Further improvement in the dielectric constant was achieved by using the plastic in which ceramic particles pre-coated with wax had been finely dispersed.
- the present invention makes it possible to make capacitors smaller, as they contain thin films with a high dielectric constant and, as a result, to make electronic devices smaller and more lightweight.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
- 1. Field of the Invention This invention relates to a plastic capacitor, particularly to a compact plastic capacitor with a large capacitance.
- 2. Description of the Related Art
- Electronic products are getting lighter, thinner, and compacter in recent years, while at the same time their performance is rapidly improving. To keep up with these advancements, there have been strong demands for compacter capacitors. In order to make the size of capacitors smaller, however, it is essential to increase the capacitance. This is achieved by increasing the surface area of electrodes, by decreasing the distance between electrodes, and by adopting materials of a high dielectric constant for dielectrics.
- Materials used for the dielectrics in capacitors include paper, plastic, and ceramic. Plastic is advantageously used because it can be easily processed into a thin film, has high resistivity, and, due to its low hygroscopic property, has higher insulation resistance than paper.
- Ceramic, on the other hand, has a higher dielectric constant than plastic. It has a disadvantage, however, that the overall size of a capacitor using ceramic becomes larger, due to its hard processability into a thin film, than that of a capacitor made from plastic.
- In view of the foregoing, it is an object of the present invention to provide a plastic capacitor that is compact and has large capacitance. This is achieved by using dielectrics formed of plastic with an improved dielectric constant and high processability.
- According to one aspect of the present invention, the capacitor is composed of dielectrics formed of a plastic film containing ceramic particles, which have been pre-coated with wax.
- According to another aspect of the present invention, said ceramic is selected from the group consisting of titanium oxide, barium titanate, aluminum oxide, magnesium silicate, strontium oxide, zircon, aluminum nitride, carbon nitride, silicon carbide, zinc borosilicate glass, tantalum, and mixtures thereof
- The capacitor of the present invention includes dielectrics formed of plastic in which fine ceramic particles are dispersed. Said ceramic particles are, prior to dispersing in the plastic, pre-coated with wax on the surface by being immersed in the molten wax.
- Said plastic is selected from the group consisting of polyethylene, polypropylene, polyethylene terephthalate, polystyrene, polycarbonate and polytetrafluoroethylene.
- Said ceramic is selected from the group consisting of titanium oxide, barium titanate, aluminum oxide, magnesium silicate, strontium oxide, zircon, aluminum nitride, carbon nitride, silicon carbide, zinc borosilicate glass, tantalum, and mixtures thereof, preferably from titanium oxide, barium titanate and aluminum oxide.
- In the embodiment of this invention, said ceramic is applied in fine particles whose diameter is practically 0.1 -0.4 μm, though it is more desirable that said diameter be smaller.
- Said wax is selected from the group of petroleum wax such as paraffin wax and microcrystalline wax, polyethylene wax obtained by cracking polyethylene, and natural fat such as fatty acids. The boiling point and the freezing point of the wax are important factors when the wax is selected, because the wax coating on the ceramic particles should be stable at room temperature and when immersed into the molten plastic. The boiling point and the freezing point of the wax depend on the components included, especially on the hydrocarbon length therein. In the present invention, the boiling point of the wax should be higher than the melting temperature of the plastic, practically higher than 200° C. The freezing point should be higher than room temperature.
- The objective of coating the surface of the ceramic particles with wax is to increase the affinity of the ceramic to the plastic. Therefore, the wax should be selected considering the properties of the plastic being used. For example, polyethylene wax or petroleum wax is preferably selected for polyethylene and polypropylene, while natural fat such as beeswax or carnauba wax is suitable for polyethylene terephthalate, polystyrene, and polycarbonate.
- Coating of the ceramic particles with wax is attained by immersing the particles in the molten wax, and stirring thoroughly the mixture. The temperature of this treatment varies depending on the wax selected and on the plastic selected, but typically is 70-100° C.
- Alternatively, coating of the wax is also attained by immersing the particles into the solution prepared by dissolving the wax in an organic solvent having a relatively low boiling point, and by evaporating the solvent later to make the ceramic particles coated evenly with a small amount of the wax.
- The ratio of wax to ceramic particles may be extremely small, considering it is sufficient for the wax component to cover only the surface of the particles. Practically, though, a larger amount of wax is used. The amount in weight is 0.1-2.0 parts of wax, preferably 0.3-0.5 parts of wax, for each 100 parts of ceramic particles.
- Dispersing the ceramic particles into the plastic is attained by introducing the particles into the plastic that is molten by heating, and then mixing the mixture well.
- An alternative method is to first prepare a “master batch” of the plastic that contains a high-concentration of the ceramic particles, and then melt said master batch mixing with the plastic that has no ceramic particles. The “master batch” method is advantageous for facilitating the dispersion of the ceramic particles in the plastic.
- The amount of the ceramic particles added to the plastic is preferably 2-15wt. %, more preferably 5-10 wt. %, in the mixture. If said amount is less than 2 wt. %, it is sometimes insufficient for the effect expected in this invention, and if said amount is more than 15 wt. %, it sometimes causes difficulty in producing a thin film.
- The plastic in which ceramic particles are dispersed is then extruded into a thin film to be applied to a capacitor. The thickness of said film is, though it varies depending upon the capacitor to which said film is applied, typically 2-16 μm. The film may be stretched in one or two axial directions.
- In the present invention, the ceramic particles are pre-coated with wax to increase said particles' affinity to organic plastic to promote uniform dispersion of said particles in the plastic. When the ceramic particles do not undergo a wax coating prior to being dispersed in the molten plastic, the association of the particles may not be sufficiently broken, which prevents uniform dispersion. The uniform dispersion gives the capacitor a preferable performance, particularly in its capacitance.
- All these processes at a high temperature, mentioned above, should be performed under an inert atmosphere in order to prevent the plastic from being oxidized.
- The capacitor is manufactured by first piling up the films and electrode foils, such as aluminum or tin, in alternate layers, and then rolling up the resulting multi-layered sheet. Alternatively, it is also attained by first depositing some metal on the film, and then rolling it up.
- Process for coating fine ceramic particles
- 0.3 weight parts of polyethylene wax and 100 weight parts of fine ceramic particles were mixed at 100° C. under a nitrogen atmosphere to form the polyethylene-wax coated ceramic particles, which were then added to the molten polypropylene. The polypropylene in which the ceramic particles were dispersed was then kneaded and extruded to a thin film. By the same way, a polyethylene terephthalate film in which carnauba-wax-coated ceramic particles were dispersed was prepared.
- The results of measuring the dielectric constants of the films are shown in Table 1.
TABLE 1 Ceramic Particles Dielectric Weight % Constant in the (room temp., Plastic Ceramic Wax plastic 1 MHz) Example 1 Polyethylene Titanium Polyethylene 4 4.7 2 oxide wax 7 5.3 3 Aluminum Polyethylene 7 3.8 oxide wax 4 Polyethylene Titanium Carnauba-wax 7 6.1 terephthalate oxide 5 Aluminum Carnauba-wax 7 4.5 oxide Compara- 6 Polyethylene None None — 2.2 tive 7 Titanium None 7 3.9 Example oxide 8 Polyethylene None None — 3.1 9 terephthalate Titanium None 7 4.8 oxide - Plastic having a high dielectric constant was obtained by dispersing ceramic particles in it. Further improvement in the dielectric constant was achieved by using the plastic in which ceramic particles pre-coated with wax had been finely dispersed.
- The present invention makes it possible to make capacitors smaller, as they contain thin films with a high dielectric constant and, as a result, to make electronic devices smaller and more lightweight.
- The foregoing examples are illustrative of the present invention, but the present invention is not limited to said examples. The invention is defined by the following claims, with equivalents of the claims to be included therein.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000370650A JP2002175934A (en) | 2000-12-05 | 2000-12-05 | Capacitor |
JP2000-370650 | 2000-12-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020101703A1 true US20020101703A1 (en) | 2002-08-01 |
US6501639B2 US6501639B2 (en) | 2002-12-31 |
Family
ID=18840504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/000,502 Expired - Fee Related US6501639B2 (en) | 2000-12-05 | 2001-12-04 | Plastic capacitor |
Country Status (2)
Country | Link |
---|---|
US (1) | US6501639B2 (en) |
JP (1) | JP2002175934A (en) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7914755B2 (en) * | 2001-04-12 | 2011-03-29 | Eestor, Inc. | Method of preparing ceramic powders using chelate precursors |
US7595109B2 (en) * | 2001-04-12 | 2009-09-29 | Eestor, Inc. | Electrical-energy-storage unit (EESU) utilizing ceramic and integrated-circuit technologies for replacement of electrochemical batteries |
US7729811B1 (en) | 2001-04-12 | 2010-06-01 | Eestor, Inc. | Systems and methods for utility grid power averaging, long term uninterruptible power supply, power line isolation from noise and transients and intelligent power transfer on demand |
US7466536B1 (en) | 2004-08-13 | 2008-12-16 | Eestor, Inc. | Utilization of poly(ethylene terephthalate) plastic and composition-modified barium titanate powders in a matrix that allows polarization and the use of integrated-circuit technologies for the production of lightweight ultrahigh electrical energy storage units (EESU) |
US20110170232A1 (en) * | 2004-08-13 | 2011-07-14 | Eestor, Inc. | Electrical energy storage unit and methods for forming same |
KR100764829B1 (en) | 2006-03-14 | 2007-10-09 | 동남석유공업(주) | A manufacturing method of insulator for condenser |
US7648687B1 (en) | 2006-06-15 | 2010-01-19 | Eestor, Inc. | Method of purifying barium nitrate aqueous solution |
US7993611B2 (en) * | 2006-08-02 | 2011-08-09 | Eestor, Inc. | Method of preparing ceramic powders using ammonium oxalate |
US8853116B2 (en) * | 2006-08-02 | 2014-10-07 | Eestor, Inc. | Method of preparing ceramic powders |
US8145362B2 (en) * | 2006-08-04 | 2012-03-27 | Eestor, Inc. | Utility grid power averaging and conditioning |
EP2401227A4 (en) * | 2009-02-27 | 2013-04-03 | Eestor Inc | Reaction tube and hydrothermal processing for the wet chemical co-precipitation of oxide powders |
JP2011114333A (en) * | 2009-11-24 | 2011-06-09 | Goro Igarashi | Capacitor for versatile use |
CN101786864B (en) * | 2009-12-22 | 2012-12-05 | 广东风华高新科技股份有限公司 | Ceramic dielectric material matched with nickel inner electrode and production method of capacitor produced by ceramic dielectric material |
WO2012134424A2 (en) * | 2010-01-20 | 2012-10-04 | Eestor, Inc. | Purification of barium ion source |
WO2017139284A2 (en) * | 2016-02-12 | 2017-08-17 | Capacitor Sciences Incorporated | Capacitive energy storage cell, capacitive energy storage module, and capacitive energy storage system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4072532A (en) * | 1975-11-20 | 1978-02-07 | Nasa | High temperature resistant cermet and ceramic compositions |
US4229865A (en) * | 1978-12-28 | 1980-10-28 | Western Electric Company, Incorporated | Machine for laser scribing and winding metallized film capacitor blanks |
JPH0770423B2 (en) * | 1986-09-17 | 1995-07-31 | 日本石油化学株式会社 | Oil immersion condenser |
US4902841A (en) * | 1987-03-11 | 1990-02-20 | Nippon Petrochemicals Company, Ltd. | Method for producing electrical insulating oil composition |
-
2000
- 2000-12-05 JP JP2000370650A patent/JP2002175934A/en active Pending
-
2001
- 2001-12-04 US US10/000,502 patent/US6501639B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6501639B2 (en) | 2002-12-31 |
JP2002175934A (en) | 2002-06-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6501639B2 (en) | Plastic capacitor | |
DE69014027T2 (en) | Thin film capacitors and their manufacturing processes. | |
JP5261896B2 (en) | Coating composition | |
US4426356A (en) | Method for making capacitors with noble metal electrodes | |
DE69016605T2 (en) | Crystallizable glasses and thick-film compositions made therefrom. | |
KR101889047B1 (en) | Metal foil coated with filled resin layer and process for producing metal foil coated with filled resin layer | |
JPH03142808A (en) | Thick film conductor composite | |
DE4017518A1 (en) | METHOD FOR PRODUCING MONOLAYER CAPACITORS | |
DE1771503B2 (en) | THERMAL CRYSTALLIZABLE GLASS AND CERAMIC GLASS BASED ON SIO TIEF 2-PBO-BAO-AL TIEF 2 O TIEF 3TIO TIEF 2 AND THEIR USE | |
EP2305743A1 (en) | Dielectric film, associated article and method | |
DE102006059002A1 (en) | Method for producing an integrated circuit on a semiconductor substrate | |
DE2714196A1 (en) | DIELECTRIC COMPOSITIONS OF MAGNESIUM TITANATE AND THEIR USES | |
DE69925429T2 (en) | Nickel composite powder and method of its production | |
DE69022668T2 (en) | Electronic connections, methods of forming end connectors therefor and paste for forming the same. | |
DE10035172B4 (en) | Ceramic mass and capacitor with the ceramic mass | |
EP1114007B1 (en) | Reduction-stable ceramic substances | |
DE4005505A1 (en) | MONOLITHIC CERAMIC CONDENSER | |
DE4005507C2 (en) | Dielectric ceramic composition | |
CN1674761A (en) | Thick-film dielectric and conductive compositions | |
DE4319045A1 (en) | Low porosity fluoro-polymer electric substrate material - comprises coated ceramic filler in matrix contg. both PTFE and another fluoro:polymer of lower melt viscosity | |
US3232856A (en) | Fabrication of a miniature capacitor | |
JPS6159714A (en) | Composite dielectric capacitor | |
EP1259968B1 (en) | Antenna with composite material | |
DE19918091A1 (en) | Reduction-stable high dielectric constant ceramic material capacitors with nickel internal electrodes, comprises barium titanate core and mixed oxide shell components made using silica and boric acid sintering aid | |
JP2002057060A (en) | Multilayer ceramic capacitor and internal electrode paste used for the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MEDIC CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TAKAFUJI, YUSUTANE;KATO, SHINUKE;REEL/FRAME:012346/0572 Effective date: 20011130 |
|
AS | Assignment |
Owner name: TECHNOLOGY MANAGEMENT CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MEDIC CO., LTD.;REEL/FRAME:014484/0950 Effective date: 20030822 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20061231 |